Lever.



No. 867,009. PATENTED SEPT..24, 1907.

T. BRENNAN, JR-

LEVER. APPLICATION FILED JUNE 24, 1907.

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No. 367,009. PATENTED SEPT. 24,1907.

' T. BRENNANLJB.

LEVER.

APPLIOATION FILED 111N324, 1907. I

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UNITE STATES PATENT OFFICE.

THOMAS BRENNAN, JR, OF ST. LOUIS PARK, MINNESOTA, ASSIGNOR TO MONITORDRILL COMP-ANY, OF ST. LOUIS PARK, MINNESOTA, A CORPORATION OFMINNESOTA.

LEVER.

Specification of Letters Patent.

Patented Sept. 24, 1907.

.A'mlicatiaa f ed June 24,1907. Serial No. 380,470.

. clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to the construction of levers or arms, and moreparticularly to those that are used in connection with angular shafts towhich they are anchored or secured, and has for its object to improvethe same in the several particulars hereinafter noted.

To the above ends the invention consists of the novel devices andcombinations of devices hereinafter described and defined in the claims.

The immediate object had in view in designing the improved lever or armwas to provide improved devices of this character for use in connectionwith the disk raising and lowering devices of seeders and drills, butthe same principle of construction may be employed in various othermachines.

In the accompanying drawings, the invention is illustrated as applied toa dis'lf drill for the particular purpose above indicated.

In these drawings, like characters indicate like parts throughout theseveral views.

Referring to the drawings, Figure 1 is a view partly in side elevation,partly in diagram and partly in section and with some parts broken away,illustrating my invention applied as above stated. Fig. 2 is a plan viewshowing a presser arm constructed in accordance with my invention. Fig.3 is a section taken on the line 90 x of Fig. 2. Fig. 4 is a view inrear elevation, showing a lever also designed in accordance with myinvention. Fig. 5 is a detail in plan and Fig. 6 is a detail in sideelevation illustrating a modified form of the arm shown in detail inFigs. 2 and 3.

Referring to the parts of the disk drill, the numeral 1 indicates thewheels, the numeral 2 the axle, the numeral 3 the frame, the numeral 4the seed hopper, the

numeral 5 one of the grain delivery spouts, the numeral 6 one of theshoes, the numeral 7 one of the disks, the numeral 8 one of the dragbars, and the numeral 9 the seat.

The numeral 10 indicates a square or angular rock shaft of the diskraising and lowering device, also frequently designated as the presserdevice. In the usual construction, this rock shaft is manipulated by alatch lever that cooperates with a fixed lock segment 11 on the rear ofthe frame 3, and is provided with a plurality of presser arms that areconnected to-the respective seed boots 6, each by a rod 12, around whichis placed coiled presser spring 13.

In the preferred application of my invention to this mechanism eachso-called presser arm is made up of a pair of laterally spaced flatmetal members 14, the pivotally mounted ends of which are provided withangular seats that fit (preferably quite loosely) upon the square orangular shaft 10. For a square shaft, such as shown, these seats shouldalso be square but they may be made enough larger in size to permit themto be freely slid upon the said shaft. Preferably, these arm members 14are stamped from sheet wrought iron or steel. Between the said armmembers, adjacent to the shaft 10, is placed a pair of reversely bowedspring metal spacing and clamping members 1.5 and through perforationsin these members 15 and in the arm members 14, a nutted bolt 16 ispassed.

The bowed? portions of the clamping members 15 are pressed together andthe end portions thereof are pressed against the respective arm members14, when the bolt 16 is tightened. Those ends of the .said springmembers 15 that are turned toward the angular shaft 10 are notched tofit the adjacent angle of the shaft, as best shown in Fig. 3, and whenthe said nutted bolt 16 is tightened, these notched ends are tightlypressed against the engaged portion of the shaft, and the oppositeangular side of the shaft is tightly wedged against the opposite angularportion of the seat 14 of the said arm members 14. It will thus be seenthat the composite arm, when the nutted bolt 16 tightened, will be veryrigidly clamped to the said angular shaft between the notched ends ofthe clamping and spacing member 15 and the opposite sides of the saidangular seats 14*, so that it is not, in fact, very material what shapeis given to those portions of the seats 14 that are covered by thenotched ends of the said clamping members 15.v

In the particular application of the arm illustrated in Figs. 1, 2 and 3of the drawings, a spring cap 17 is placed between and pivotallyconnected to the free ends of the arm members 14 and the rod 12 ispassed through this cap so that the said cap may bear against the upperend of the spring 13.

In the application of the same principle of construction to the latchlever 18 which cooperates with the lock segment 11, to hold the rockshaft 10 in different adjustments, laterally spaced flat metal members19 are bolted or otherwise secured to the lower end of said lever, andthese, like the arm members 14, areprovided with angular seats thatengage the square shaft 10. Also, spring spacing and clamping members 20that correspond to the members 15 are placed between the members 19, andthe said parts 19 and 20 are clamped together by a nutted bolt 21, andthe notched ends of the said members 20 are forced against the adjacentangular portion of the said shaft 10 in the same manner described inconnection with the so-called presser arm. A lever or arm of the kindabove described may be very cheaply constructed and is strong anddurable. It has the further advantage that it may be made in any machineshop and, therefore, affords a very desirable substitute forcorresponding parts that have hitherto almost universally been made frommalleable iron. 7 The form of arm illustrated in Figs. 5 and 6, whileWithin the broad scope of my invention, does not involve all of thenovel features of the construction illustrated in Figs. 1 to 4inclusive. It, however, has these features in common; laterally spacedarm members and a combined spacing and clamping member interposedbetween them, which latter is held clamped between the arms and engagedwith the shaft by a common bolt or clamping means. Referring to thedetails thereof, the numeral 22 indicates a round shaft shown in theform of a pipe, and the numeral 23 indicates the laterally spaced metalarm members whichhave seats through which the shaft 22 is passed. Thenumeral 24 indicates a combined spacing and clamping block which isplaced between the arm members 23, and is provided with a lug or lockprojection 25 that engages the perforation or seat in the tubular shaft22. A short nutted bolt 26 is passed through the arm members 23 andthrough the block 24 and serves to clamp the said block between the saidarm members and to hold the same pressed against the shaft 22 with itslug 25 interlocked with the seat thereof, so that the said arm is lockedin said shaft for pivotal movements therewith.

In the claims the term arms is used in a broad sense to include Whatmight sometimes be designated as a lever. The term angular shaft is usedin a broad sense to include a shaft that is other than round in crosssection.

What I claim is:

1. The combination with an angular shaft, of an arm made up of laterallyspaced members lnwii g seats engaging said shaft, :1 combined sparingand clamping member interposed between said arm members, and means forclumping said arm members onto said spacing and clumping member andforcing the same against the said shaft. substantially as described 2.The combination with an angular shaft. of a pair of laterally spaced armmembers having angular seats ongaging said shaft, a pair of re erselybowed spring ehimu ing and spacing members interposed between said :Hlllmembers, and a bolt passed through said arm members and interposedspring members. and forcing the ends of the latt'er against the angularshaft, substantially us described.

3. The combination with an angular shaft. of :1 pair of laterally spacedarm members having :ingulur seats ongaging said shaft, :1 pair ofrcversely bowed spring clumping and spacing members placed with theirbowed portions pressed together and with their end portions engagingsaid arm members and having notched ends that engage the adjacentangular portion of said shaft, and :1 nutted bolt passed through saidarm members and interposed spring members, substantially as described.

4. The combination with :1 shaft, of an arm made up of laterally spacedmembers having seats that engage said shaft, :1 combined spacing andclamping member interposed between said arm members adjacent: to saidshaft, and a bolt passed through said arm members and spacing andclamping member and holding the latter and the suid arm membersinterlocked to the said shaft, substnntiultt as described.

In testimony whereof I uflix my signature in presence of two witnesses.

TII'OHAS BRENNAN, R.

Witnesses SPENCER E. DAVIS, C. C. WoLFonn.

